Add upper bound pin for polars (rapidsai#16442)

This aligns the polars dependency with the most modern version supported by cudf-polars in this branch.

Authors:
  - Lawrence Mitchell (https://github.com/wence-)

Approvers:
  - James Lamb (https://github.com/jameslamb)

URL: rapidsai#16442

dependencies.yaml

@@ -631,7 +631,7 @@ dependencies:
     common:
       - output_types: [conda, requirements, pyproject]
         packages:
-          - polars>=1.0
+          - polars>=1.0,<1.3
   run_dask_cudf:
     common:
       - output_types: [conda, requirements, pyproject]

python/cudf_polars/pyproject.toml

@@ -20,7 +20,7 @@ license = { text = "Apache 2.0" }
 requires-python = ">=3.9"
 dependencies = [
     "cudf==24.8.*,>=0.0.0a0",
-    "polars>=1.0",
+    "polars>=1.0,<1.3",
 ] # This list was generated by `rapids-dependency-file-generator`. To make changes, edit ../../dependencies.yaml and run `rapids-dependency-file-generator`.
 classifiers = [
     "Intended Audience :: Developers",